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燃气对输送管道的腐蚀,目前国内对这方面腐蚀的研究较少,然而由于燃气对管道的腐蚀而造成的事故,甚至酿成灾难的情况,在国内时有发生。我们采用先进的现代物理手段(金相显微镜、能谱、X—射线衍射)以及传统的化学分析方法,对北京鲁谷高压煤气管道局部大面积穿孔的原因,从材料(宏观结构、微观结构,非金属夹杂物)、腐蚀环境、腐蚀产物三个大的方面进行了系统分析。实验分析证明,氯离子和硫化氢在酸性水溶液中,对A3钢具有强烈的腐蚀作用。是造成燃气管道严重穿孔的主要原因。通过现代物理手段对燃气管道内腐蚀的研究,本文给出了一些重要的成果。
The corrosion of gas pipelines to the transmission pipeline is currently less studied in China. However, accidents caused by the corrosion of gas pipelines and even disasters have occurred in the country. We use advanced modern physical methods (metallographic microscope, energy spectrum, X-ray diffraction) and traditional chemical analysis methods to analyze the reasons for large-area perforation of high-pressure gas pipelines in Lugu, Beijing, from materials (macrostructures, microstructures, The three major aspects of non-metallic inclusions, corrosion environment, and corrosion products were systematically analyzed. Experimental analysis shows that chloride ion and hydrogen sulfide have strong corrosion effect on A3 steel in acidic aqueous solution. This is a major cause of severe perforation of the gas pipeline. Through the study of internal corrosion of gas pipelines by modern physical means, this paper gives some important results.